Bell Crank Lever

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A lever is a simple machine that consists of a beam or rigid bar that pivots at a fixed point called the fulcrum. It is used to exert force on an object to move it, either by pushing or pulling on the lever itself or by moving the fulcrum. Levers are essential in many everyday tasks and can be found in various forms, such as see-saws, nut crackers, and tweezers.